To add a logo to your account is simple. Go to “Account Settings” on the left then click on the "My Preferences" button > then the "My Pictures" tab. Here you can upload images and even delete previously uploaded images.
Images with the extensions .gif, .jpeg, .jpg, .png are accepted.
Note that images may be resized in certain contexts to better fit the space provided, for this reason we recommend .png files as they react best to this resizing process. Although, all the accepted file extensions will work, if you experience any problems try to upload the file as a .png or upload larger images with more pixels.